Страница 1 мировой engineering стандарты общая спецификация

DataTransfer ($36)
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25.06.2020
WORLDWIDE ENGINEERING STANDARDS General Motors Local Area Network Enhanced Diagnostic Test Mode Specification
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© Copyright 2010 General Motors All Rights Reserved
February 2010
Page 277 of 336
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Used to download a programming algorithm into a node or execute a node resident routine and to
transfer the operational software and/or calibration data to the node.
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Interleave TesterPresent messages using AllNodes CANId with AllNodes extended address.
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Continue until the node is completely programmed.
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Optionally use the 
WriteDataByIdentifier ($3B) 
service to write any data which needs to be
performed prior to executing a software reset.
Note: 
It may be necessary to perform multiple service $34/$36 sequences to download the data into the ECU
(e.g., one sequence for each downloaded module).
Page 278
GM WORLDWIDE ENGINEERING STANDARDS
GMW3110
Certain steps may be required to be performed after a software reset of an ECU. When the utility file of an
ECU reaches this point, the interpreter has to synchronize a software reset with all other interpreters running in
parallel. At the point in time when each interpreter reaches the step in the utility file where the conclusion of the
programming session is requested the tester shall conclude the programming event by transmitting a
ReturnToNormalMode ($20) request message onto each GMLAN subnet (master execute). See Table 231.
Table 231: Programming Procedure Conclusion
Step Action
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ReturnToNormalMode ($20) 
using the AllNodes CANId with AllNodes extended address (to all links
as required). If the tool has established the programming session on SWCAN then it must ensure that
the service $20 is sent on this bus first so all ECUs on SWCAN can switch the baud rate before the
MSSC ECUs reset and potentially cause errors (due to its transceiver being in low speed operation
and all other nodes still in high speed operation).
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The nodes do not respond to a mode $20 request if ProgrammingMode ($A5) service is enabled.
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Receipt of a $20 request causes the nodes to exit ProgrammingMode ($A5).
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Receipt of a $20 request also switches the low speed link back to low speed mode (if the
programming event was performed in high speed mode).
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All nodes perform a software reset to enable execution of the new operational software and/or
calibration and to synchronize communications startup.
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